S-13 Water Supply and Pressure Requirements

Question 1

What is the minimum residual pressure required at the highest outlet of a Class I or Class III standpipe system in New York City during operation?

Accepted Answer

100 psi

Answer

65 psi

Answer

75 psi

Answer

50 psi

Question 2

What is the maximum allowable pressure at any standpipe outlet hose connection to prevent hose control problems for firefighters?

Accepted Answer

200 psi

Answer

150 psi

Answer

175 psi

Answer

250 psi

Question 3

Which water supply source is considered the primary supply for standpipe systems in most New York City high-rise buildings?

Accepted Answer

Fire pump drawing from a suction tank

Answer

Gravity tank on the roof

Answer

City water main connection

Answer

Pressure tank in the basement

Question 4

What minimum flow rate must a Class I standpipe system be capable of delivering at the two most hydraulically remote 2½-inch outlets simultaneously?

Accepted Answer

500 gpm total

Answer

250 gpm per outlet

Answer

350 gpm total

Answer

750 gpm total

Question 5

A gravity tank used as a water supply for a standpipe system must have its bottom elevation at least how many feet above the highest hose outlet it serves?

Accepted Answer

25 feet

Answer

15 feet

Answer

20 feet

Answer

35 feet

Question 6

What is the purpose of a pressure-maintenance (jockey) pump in a standpipe water supply system?

Accepted Answer

To compensate for minor system leaks and maintain system pressure without starting the main fire pump

Answer

To boost pressure during active firefighting

Answer

To fill the suction tank automatically

Answer

To test standpipe pressure weekly

Question 7

Under FDNY regulations, what is the minimum capacity of a suction tank that serves as the sole water supply for a standpipe system in a building over 100 feet tall?

Accepted Answer

7,500 gallons

Answer

3,500 gallons

Answer

5,000 gallons

Answer

10,000 gallons